Abstract
In southwest Oregon, varying amount of brush were removed from a sclerophyll brush-field dominated by canyon live oak ( Quercus chrysolepis Liebm.), and greenleaf manzanita ( Arctostaphylos patula Green) with scattered Douglas-fir ( Pseudotsuga menziesii (Mirb.) Franco) saplings. Brush removal was accomplished by slashing (cut by chainsaw) near ground level at three intensities: (1) total removal, (2) partial removal, and (3) an untreated control. Sclerophyll brush species responded within three weeks of slashing by vigorous sprouting, which was greatest in total brush removal areas where 861513 sprout stems ha −1 developed during the first year. Soil water potentials and predawn xylem pressure potentials of Douglas-fir were less negative in total removal areas than in partial removal and untreated control areas. Relative growth rates of Douglas-fir saplings temporarily increased in total and partial brush removal areas, but were not significantly different from the untreated control three years after treatment. Slashing of sclerophyll brush to release long-suppressed Douglas-fir as described in this study, is not recommended because of rapid brush recovery by sprouting.
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